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| Setting up Backup Mail https://forum.linode.com/viewtopic.php?f=11&t=1023 |
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| Author: | Brenden [ Sat Jul 17, 2004 2:37 am ] |
| Post subject: | Setting up Backup Mail |
Hi How do I setup sendmail to act as a backup mail server (store and forward) for an unlimited amount of domains. |
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| Author: | rjp [ Sun Jul 18, 2004 8:59 am ] |
| Post subject: | use the access database |
In Debian and Fedora (and presumably Red Hat), the default sendmail.mc has the access database enabled. You can use this to add domains that you wish to relay; for each domain for which you wish to be a backup MX, go to the /etc/mail directory, and add a line of the form: Code: domain.example.com RELAY to the access file. Then leave your editor, and use make to build the database. While Debian's makefile will suggest you also do /etc/init.d/sendmail reload after running make, I've found that it's unnecessary in most cases. The access database can also be used to deny relaying; if there's a zombie running a dictionary attack, you can nip it in the bud with something like: Code: Connect:192.168.42.42 REJECT or Code: From:idiotspammer@example.com 550 Address unknown More information is available here. EDIT: pointing out the /etc/mail/access file. |
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